The compounding method of determining stress intensity factors for cracks in engineering structures
The compounding method of determining stress intensity factors for cracks in engineering structures
In this thesis the compounding method for determining stress intensity factors is developed and presented. The method enables stress intensity factors to be evaluated for complex geometrical cracked configurations with many boundaries from the factors for several simpler configurations with one boundary only. It is based on an alternating technique in which only the important interactions between boundaries are taken into account. The method is applied to a wide range of structural configurations which include cracks near other boundaries (eg edges, holes or other cracks) cracks at the edges of loaded or unloaded holes, and cracks near stiffeners. The method is assessed by comparing 'compounded solutions' with known solutions for several configurations. It is shown that the errors resulting from the approximations in the compounding method are a function of the number and type of boundaries near the crack. It is further shown that these errors in stress intensity factors lead to uncertainties in residual strengths and fatigue lifetime which are within engineering tolerances.
University of Southampton
Rooke, David Percy
8994ec84-6a35-4d75-a1c7-39822a3f1ef4
1982
Rooke, David Percy
8994ec84-6a35-4d75-a1c7-39822a3f1ef4
Rooke, David Percy
(1982)
The compounding method of determining stress intensity factors for cracks in engineering structures.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
In this thesis the compounding method for determining stress intensity factors is developed and presented. The method enables stress intensity factors to be evaluated for complex geometrical cracked configurations with many boundaries from the factors for several simpler configurations with one boundary only. It is based on an alternating technique in which only the important interactions between boundaries are taken into account. The method is applied to a wide range of structural configurations which include cracks near other boundaries (eg edges, holes or other cracks) cracks at the edges of loaded or unloaded holes, and cracks near stiffeners. The method is assessed by comparing 'compounded solutions' with known solutions for several configurations. It is shown that the errors resulting from the approximations in the compounding method are a function of the number and type of boundaries near the crack. It is further shown that these errors in stress intensity factors lead to uncertainties in residual strengths and fatigue lifetime which are within engineering tolerances.
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Published date: 1982
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Local EPrints ID: 460320
URI: http://eprints.soton.ac.uk/id/eprint/460320
PURE UUID: 7171a784-bba3-4699-afe6-e8c2d6634239
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Date deposited: 04 Jul 2022 18:18
Last modified: 16 Mar 2024 18:37
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Author:
David Percy Rooke
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